/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.tomakehurst.wiremock.servlet;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ContentTypeSettingFilter implements Filter {
    
    private ServletContext context;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        context = filterConfig.getServletContext();
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
            ServletException {
        
        if (response instanceof HttpServletResponse) {
            String filePath = ((HttpServletRequest) request).getRequestURI();
            String contentType = context.getMimeType(filePath);
            if (contentType == null) {
                contentType = "application/json";
            }
            ((HttpServletResponse) response).setContentType(contentType);
        }
        
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
    }

}
